EP0225439A1 - Multiple dosage syringe - Google Patents
Multiple dosage syringe Download PDFInfo
- Publication number
- EP0225439A1 EP0225439A1 EP86112792A EP86112792A EP0225439A1 EP 0225439 A1 EP0225439 A1 EP 0225439A1 EP 86112792 A EP86112792 A EP 86112792A EP 86112792 A EP86112792 A EP 86112792A EP 0225439 A1 EP0225439 A1 EP 0225439A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- teeth
- rod
- piston
- unit
- movement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
- A61M5/31595—Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M2005/341—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub angularly adjustable or angled away from the axis of the injector
Definitions
- the present invention is directed to a syringe-like dispensing device capable of discharging relatively small metered quantities of material to a desired location for use and quickly repeating such discharges, if desired, until a sufficient amount has been applied where it is needed.
- the device of the present invention provides a means to deliver successive unit doses of cement, adhesives, pit and fissure sealants, filling materials and similar medical materials directly to the site in vivo.
- the syringes illustrated in said patents are of what is generally known as the pistol-grip type of syringe and include a lever movable relative to a handle and, in general, driving a piston rod having notches or teeth which are engaged by suitable advancing means actuated by the pivoted lever when moving toward and from said handle.
- a separate syringe having a movable piston therein is inserted within a compartment in the forward end of the barrels of the syringes. It also is to be noted that these prior devices lack precise control of the placement of the material in metered, pre-measured amounts, especially in small amounts.
- a more simple type of multiple dosage syringe comprises the subject matter of prior U.S. Patent No. 2,875,761 - Helmer et al, dated March 3, 1959.
- a plunger within the barrel of the syringe is actuated by an elongated member having a series of spaced notches therein which are capable of being engaged by a flexible stop member; the stop member riding along a smooth surface on the member until a subsequent notch is reached, at which time the flexible member drops into the notch and stops further feeding movement of the plunger.
- the present invention while not restricted thereto, primarily has been designed to support at the outer, delivery end thereof, a disposable, predosed ampule, syringe or cartridge such as that comprising the subject matter of prior U. S. Patent No. 4,391,590 to Dougherty, patented July 5, 1983; but the invention is not particularly restricted to the employment of that specific cartridge or compule, details of such syringe being set forth below.
- the invention dispenses material in metered, uniform doses or amounts which are clearly visible to the operator and such dispensing occurs by finger action of a control member which in no way is fatiguing due to minimum energy being required.
- the elongated body member having a rod-like feed member supported longitudinally therein and including spring or other pressure means arranged to normally urge or bias the feed means in forward, feeding direction; and the forward feeding movement of said feed member being controlled by a transversely reciprocal stop and release unit which effects successive, single increments of movement, which movement is stopped at the end of each advancing step while said spring meanwhile is endeavoring to move the feed member in feeding direction.
- the forward feeding pressure force may be a compressed spring, air pressure or other equivalent means, if alternative means are desired.
- Another object of the invention is to provide rows of rack teeth on the elongated feed member or rod, which rows of rack teeth successively are engaged by movement-stopping teeth in the combination unit intermittently following engagement of additional movement-advancing teeth also carried by the combination unit for engaging the opposite row of rack teeth and the configuration of the respective teeth produces the limited desired feeding movement of the feed member.
- a further object of the invention is to provide said movement-controlling combination unit with a dog mounted in the unit for limited pivotal movement and having one or more teeth thereon adapted to engage one of said rows of rack teeth in a cam-like manner so as to effect limited increment of advance movements of the elongated feed member when the unit depressed, said depressing movement also disengages the stop teeth of the unit from engagement with the opposite row of rack teeth, whereby as the actuating unit is successively reciprocated, the elongated feed member is progressively advanced and stopped sequentially.
- Still another object of the invention is to provide the optionally disposable, predosed ampule, syringe or cartridge with a piston movable within the compartment in which the material to be dispensed is contained, said piston being engaged by the forward end of the aforementioned elongated feed member, the movement of which is controlled by the combination unit which is successively depressed and released, and when released, additional pressure means are arranged to project the unit to its extended or projected position, at which time the movement-stopping teeth thereon engage teeth of the adjacent elongated rack which stops the advancing movement.
- Fig. 1 is a fragmented illustration showing substantially the forward and rearward halves of the device in such fragmented manner for purposes of adapting the same to the sheet on a scale to render the components readily observable.
- the syringe comprises a bi-partite construction including a forward half 10 of a body and a rearward half 12 thereof, which are fixed together in telescoping manner as shown at the connection 14.
- forward half 10 of the body includes a forward nose portion 16, which is fixed by a telescoping connection 18 to the main section of the forward half 10 of the body.
- the assembled halves of said body conveniently may be held pen-like in a human hand.
- the forward nose portion 16 also includes means which receive, preferably by snap-action, a disposable predosed ampule syringe or cartridge 20 which comprises one form of receptical within which material to be delivered to a location of use is contained for discharge through a nozzle 22 which may be detachable or otherwise.
- a disposable predosed ampule syringe or cartridge 20 which comprises one form of receptical within which material to be delivered to a location of use is contained for discharge through a nozzle 22 which may be detachable or otherwise.
- the invention is not to be restricted to the use of the ampule or cartridge 20; but may, in the forward nose portion 16 or otherwise, contain a compartment within which such material may be housed or contained for discharge through another type of nozzle means, not shown.
- the compartment comprising the ampule or cartridge 20 contains a piston 24, which in turn, is positioned to be engaged by the forward end of an elongated plunger rod 26, the rearward portion of which includes an upper rack of teeth 28 of a shape which may be the same as or different from the lower rack of teeth 30, as required, since these rows of teeth in the racks respectively serve different purposes as explained hereinafter.
- the elongated plunger rod 26 terminates in a manually engageable rear portion 32 having a button 34 on the terminal end thereof.
- the plunger rod 26 also preferably is provided on at least one side with a longitudinal guide rib 31 slidable within a suitable complementary groove in the forward half 10 of the body to prevent rotation of the rod about its axis, as seen in Fig. 2.
- a transversely extending guide and abutment member 36 Fixed between the plunger rod 26 and its manually engageable rear portion 32 is a transversely extending guide and abutment member 36, which is abutted by one end of pressure means comprising a coiled compression spring 38, which surrounds the manually engageable rear portion 32, and the other end of the spring abutts the innermost end 40 of cylindrical cavity 42, which contains said spring.
- pressure means comprising a coiled compression spring 38, which surrounds the manually engageable rear portion 32, and the other end of the spring abutts the innermost end 40 of cylindrical cavity 42, which contains said spring.
- said spring is mounted in a manner to exert continual pressure upon the plunger rod 26 to urge or bias the same continually in feeding direction, in opposition to movement-stopping means now to be described.
- other equivalent pressure means may be used such as air or hydraulic pressure with suitable modifications.
- Actuation of the elongated plunger rod 26 as well as the piston 24 occurs in a series of forward increments of movement, which may be termed feeding movement, and then stopping such movement after each increment of movement, such operation being automatically effected and controlled by a combination stop and release unit 42, which comprises a unitary block or member 44 extending transversely to the axis of the plunger rod 26 and having an internal opening 46 through which rod 26 extends.
- the member 44 has opposite parallel sides 48 which slidably move relative to the opposite side walls of a socket recess 50, best shown in Fig. 2, and the block 44 preferably having a vertical length, as viewed in Fig.
- the block 44 of the combination unit 42 is in the elevated position such as shown in Figs. 2, 3 and 6. It is urged and maintained in this position by means of an additional compression spring 58 which, for example, is positioned by and surrounds a stud 60 molded integrally within the innermost portion of socket recess 52 as clearly shown in Figs. 2-7.
- the upper end of the spring 58 bears against the inner end of a socket 62 extending into the innermost end of block 44 of the combination unit 42.
- stop teeth 64 are complementary to the teeth of the lower rack of teeth 30 of plunger rod 26 in that they co-engage and are both provided with abuting surfaces that are substantially transverse to the axis of the plunger rod 26, as best shown in Figs. 3 and 6; hence, the reason for calling the same stop teeth 64.
- Such engagement occurs when the combination unit 42 is in the elevated position as shown in Figs. 3 and 6 and the teeth 64 are sometimes referred to hereinafter and in the claims as "first teeth".
- the combination unit 42 when moved to depressed position as indicated by the upper direction arrow shown in Figs 4 and 7, effects movement of the plunger rod 26 and piston 24 when engaged by said rod by the following mechanism.
- Dog 68 is supported upon a transverse pintle or axis 74 which, if desired, may be integrally molded with the dog 68 from suitable rigid plastic material, or otherwise, the ends of the pintle 74 being rotatably supported within complementary recesses 76 which, as best shown in Fig. 3, comprise slots 76 which are parallel to the plunger rod 26 and extend inward from one face of space 66 in the block 44 and, upon inserting the ends of the pintle 74 in said slots, said slots then are closed by frictionally inserting a rectangular block element 78 therein.
- Such blocks best shown in Figs.
- dog 68 The operation of dog 68 is as follows: Initially, when the device is in idle position, the combination unit 42 is in the elevated position such as shown in Figs 2, 3 and 6. In this position, the first teeth 64 of block 44 are in engagement with the rack teeth 30 in the lower side of plunger rod 26. When the block 44 is depressed, for example, to the positions shown if Figs.
- the first teeth 64 are disengaged from the teeth 30 of the lower rack and when in this position, if desired, the plunger rod 26 may be manually moved in feeding direction until either the forward end of plunger rod 26 engages the piston 24 of ampule or cartridge 20 or, as mentioned above, if the forward end of the body has another form of compartment to contain the dispensible material, the plunger rod 26 preferably will be complementary to the inner walls of such compartment and thus engage material to be dispensed.
- Such initial feeding movement of the plunger rod to engage either the piston or the material may occur by manually engaging the button 34 and moving the plunger rod in feeding direction.
- the member 44 is depressed to release the first teeth 64 from engagement with the rack teeth 30, it will be seen from Fig. 4 that the so-called second teeth 70 on dog 68 are merely commencing to engage the teeth 28 on the uppermost rack of teeth and, under such circumstances, the plunger rod 26 is capable of being moved in feeding direction, as shown by the arrow on said member in Fig. 4, for a limited increment of distance sufficient to effect discharging a small amount of material from the forward end of the syringe.
- the present invention provides a relatively simple multiple dosage syringe readily operated by successively manually depressing and releasing the combination stop and release member 42, comprising block 44, while comfortably and conveniently holding the device in the hand of the operator pen-like and no additional manipulation of the plunger rod 26 is required to effect such stepwise feeding.
- the mechanism employed to effect such feeding movement is far more simple than the presently used syringes capable of effecting successive movements of the plunger rod thereof, whereby the present invention constitutes a meritorious advance over the prior art.
- substantially all components of the syringe may be manufactured precisely by molding from plastic or similar rigid material, thereby minimizing the cost of production.
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- Animal Behavior & Ethology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Epidemiology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
- In various medical fields and particularly in dentistry, it is desirable and often necessary to dispense materials into a prepared cavity or a crevice in relatively small but controlled increments or units of a product. This is particularly desired relative to the delivery of dental sealant materials, but also applies to certain other materials such as cements, adhesives, coating agents and the like. The present invention is directed to a syringe-like dispensing device capable of discharging relatively small metered quantities of material to a desired location for use and quickly repeating such discharges, if desired, until a sufficient amount has been applied where it is needed. The device of the present invention provides a means to deliver successive unit doses of cement, adhesives, pit and fissure sealants, filling materials and similar medical materials directly to the site in vivo.
- Previous attempts have been made to discharge successive amounts of materials of various kinds by means of a syringe and certain syringes of a reasonably complex type have been developed and comprise the subject matter of the following U.S. patents:
1,718,596 - Smith June 25, 1929
3,141,583 - Mapel et al July 21, 1964
3,517,668 - Drickson June 30, 1970 - The syringes illustrated in said patents are of what is generally known as the pistol-grip type of syringe and include a lever movable relative to a handle and, in general, driving a piston rod having notches or teeth which are engaged by suitable advancing means actuated by the pivoted lever when moving toward and from said handle. In these devices, it also will be noted that a separate syringe having a movable piston therein is inserted within a compartment in the forward end of the barrels of the syringes. It also is to be noted that these prior devices lack precise control of the placement of the material in metered, pre-measured amounts, especially in small amounts.
- A more simple type of multiple dosage syringe comprises the subject matter of prior U.S. Patent No. 2,875,761 - Helmer et al, dated March 3, 1959. In this syringe, a plunger within the barrel of the syringe is actuated by an elongated member having a series of spaced notches therein which are capable of being engaged by a flexible stop member; the stop member riding along a smooth surface on the member until a subsequent notch is reached, at which time the flexible member drops into the notch and stops further feeding movement of the plunger.
- The present invention, while not restricted thereto, primarily has been designed to support at the outer, delivery end thereof, a disposable, predosed ampule, syringe or cartridge such as that comprising the subject matter of prior U. S. Patent No. 4,391,590 to Dougherty, patented July 5, 1983; but the invention is not particularly restricted to the employment of that specific cartridge or compule, details of such syringe being set forth below. Essentially, the invention dispenses material in metered, uniform doses or amounts which are clearly visible to the operator and such dispensing occurs by finger action of a control member which in no way is fatiguing due to minimum energy being required.
- It is among the principle objects of the present invention to provide a relatively simple, easily actuated multiple dosage device, comprising an elongated body member having at the feeding or discharge end thereof, either a compartment to contain material to be dispensed or discharged or have means to support adjacent the discharge end, a predosed ampule, syringe or cartridge, one suitable example of which is illustrated in said aforementioned prior U.S. Patent No. 4,391,590, which contains such material; the elongated body member having a rod-like feed member supported longitudinally therein and including spring or other pressure means arranged to normally urge or bias the feed means in forward, feeding direction; and the forward feeding movement of said feed member being controlled by a transversely reciprocal stop and release unit which effects successive, single increments of movement, which movement is stopped at the end of each advancing step while said spring meanwhile is endeavoring to move the feed member in feeding direction. The forward feeding pressure force may be a compressed spring, air pressure or other equivalent means, if alternative means are desired.
- Another object of the invention is to provide rows of rack teeth on the elongated feed member or rod, which rows of rack teeth successively are engaged by movement-stopping teeth in the combination unit intermittently following engagement of additional movement-advancing teeth also carried by the combination unit for engaging the opposite row of rack teeth and the configuration of the respective teeth produces the limited desired feeding movement of the feed member.
- A further object of the invention is to provide said movement-controlling combination unit with a dog mounted in the unit for limited pivotal movement and having one or more teeth thereon adapted to engage one of said rows of rack teeth in a cam-like manner so as to effect limited increment of advance movements of the elongated feed member when the unit depressed, said depressing movement also disengages the stop teeth of the unit from engagement with the opposite row of rack teeth, whereby as the actuating unit is successively reciprocated, the elongated feed member is progressively advanced and stopped sequentially.
- Still another object of the invention is to provide the optionally disposable, predosed ampule, syringe or cartridge with a piston movable within the compartment in which the material to be dispensed is contained, said piston being engaged by the forward end of the aforementioned elongated feed member, the movement of which is controlled by the combination unit which is successively depressed and released, and when released, additional pressure means are arranged to project the unit to its extended or projected position, at which time the movement-stopping teeth thereon engage teeth of the adjacent elongated rack which stops the advancing movement.
- Details of the foregoing objects and of the invention are set forth in the following specification and illustrated in the accompanying drawings comprising a part thereof.
-
- Fig. 1 is a two-part, fragmented vertical sectional view taken generally through the central area of the preferred embodiment of the syringe and showing the plunger in maximum retracted position.
- Fig. 2 is a transverse sectional view taken on the line 2-2 of Fig. 1, illustrating on a larger scale than in Fig. 1, details of the actuating unit of the syringe comprising stop and release means.
- Fig. 3 is a fragmentary sectional view taken on the line 3-3 of Fig. 2, and showing the plunger in normally latched or stop position in its maximum retracted position.
- Fig. 4 is a vertical sectional view similar to Fig. 3, but showing the actuating unit depressed sufficiently to disengage the holding teeth of the unit out of engagement with the rack teeth and also illustrating the plunger starting to move toward the left-hand end as seen in said Figure as indicated by the direction arrow included in the Figure.
- Fig. 5 is a view similar to Fig. 4, but showing the pivoted stopping member in full engagement with the rack teeth on the plunger for purposes of stopping further movement of the plunger in feeding direction.
- Fig. 6 is a sectional view similar to Figs. 3-5, but showing the actuating unit in the elevated position as shown in Fig. 2, and in which position the movement stopping teeth of the unit are engaged with the lower rack of teeth on the plunger; said view also showing a coil spring in expanded position which causes movement of the unit in the direction of the arrow shown at the top thereof while restraining the plunger from moving in feeding direction as indicated on the small direction arrow shown on said plunger in the Figure.
- Fig. 7 is a view similar to Figs. 3-6, but in which the movement stopping teeth of the unit have released engagement with the lower rack of teeth, such as when it is desired to retract the plunger in the direction of the arrow shown thereon and in which position the pivoted dog of the advancing mechanism is cammed from effective engagement with the upper row of rack teeth on the plunger.
- Referring to the drawings, it will be seen that Fig. 1 is a fragmented illustration showing substantially the forward and rearward halves of the device in such fragmented manner for purposes of adapting the same to the sheet on a scale to render the components readily observable.
- Essentially, the syringe comprises a bi-partite construction including a
forward half 10 of a body and a rearwardhalf 12 thereof, which are fixed together in telescoping manner as shown at the connection 14. Also, especially for purposes of ready assembly,forward half 10 of the body includes aforward nose portion 16, which is fixed by atelescoping connection 18 to the main section of theforward half 10 of the body. The assembled halves of said body conveniently may be held pen-like in a human hand. - As illustrated, the
forward nose portion 16 also includes means which receive, preferably by snap-action, a disposable predosed ampule syringe orcartridge 20 which comprises one form of receptical within which material to be delivered to a location of use is contained for discharge through anozzle 22 which may be detachable or otherwise. As an alternative, it is to be understood that the invention is not to be restricted to the use of the ampule orcartridge 20; but may, in theforward nose portion 16 or otherwise, contain a compartment within which such material may be housed or contained for discharge through another type of nozzle means, not shown. - In the illustration shown in Fig. 1, the compartment comprising the ampule or
cartridge 20 contains apiston 24, which in turn, is positioned to be engaged by the forward end of anelongated plunger rod 26, the rearward portion of which includes an upper rack ofteeth 28 of a shape which may be the same as or different from the lower rack ofteeth 30, as required, since these rows of teeth in the racks respectively serve different purposes as explained hereinafter. Especially as shown in the rearwardhalf 12 of the body, illustrated in the lower portion of Fig. 1, theelongated plunger rod 26 terminates in a manually engageable rear portion 32 having abutton 34 on the terminal end thereof. Theplunger rod 26 also preferably is provided on at least one side with alongitudinal guide rib 31 slidable within a suitable complementary groove in theforward half 10 of the body to prevent rotation of the rod about its axis, as seen in Fig. 2. - Fixed between the
plunger rod 26 and its manually engageable rear portion 32 is a transversely extending guide andabutment member 36, which is abutted by one end of pressure means comprising a coiledcompression spring 38, which surrounds the manually engageable rear portion 32, and the other end of the spring abutts theinnermost end 40 ofcylindrical cavity 42, which contains said spring. It will be observed that said spring is mounted in a manner to exert continual pressure upon theplunger rod 26 to urge or bias the same continually in feeding direction, in opposition to movement-stopping means now to be described. If desired, other equivalent pressure means may be used such as air or hydraulic pressure with suitable modifications. - Actuation of the
elongated plunger rod 26 as well as thepiston 24 occurs in a series of forward increments of movement, which may be termed feeding movement, and then stopping such movement after each increment of movement, such operation being automatically effected and controlled by a combination stop andrelease unit 42, which comprises a unitary block ormember 44 extending transversely to the axis of theplunger rod 26 and having aninternal opening 46 through whichrod 26 extends. Themember 44 has oppositeparallel sides 48 which slidably move relative to the opposite side walls of a socket recess 50, best shown in Fig. 2, and theblock 44 preferably having a vertical length, as viewed in Fig. 2, slightly greater than the depth of the socket recess 52 whereby, when thecombination unit 42 and especially theblock 44 thereof is fully depressed into thesocket recess 52, as shown in Fig. 4 for example, the upper end 54 ofblock 44 will project a limited distance above theuppermost surface 56 of theforward half 10 of the body of the device. - In normal, starting position, which actually is the stop position of the
plunger rod 26, theblock 44 of thecombination unit 42 is in the elevated position such as shown in Figs. 2, 3 and 6. It is urged and maintained in this position by means of anadditional compression spring 58 which, for example, is positioned by and surrounds astud 60 molded integrally within the innermost portion of socket recess 52 as clearly shown in Figs. 2-7. Preferably, the upper end of thespring 58 bears against the inner end of asocket 62 extending into the innermost end ofblock 44 of thecombination unit 42. - Mounted upon the lower end of the
internal opening 46 ofblock 44 are a series of so-calledstop teeth 64 which are complementary to the teeth of the lower rack ofteeth 30 ofplunger rod 26 in that they co-engage and are both provided with abuting surfaces that are substantially transverse to the axis of theplunger rod 26, as best shown in Figs. 3 and 6; hence, the reason for calling thesame stop teeth 64. Such engagement occurs when thecombination unit 42 is in the elevated position as shown in Figs. 3 and 6 and theteeth 64 are sometimes referred to hereinafter and in the claims as "first teeth". Thecombination unit 42, when moved to depressed position as indicated by the upper direction arrow shown in Figs 4 and 7, effects movement of theplunger rod 26 andpiston 24 when engaged by said rod by the following mechanism. - Referring to Figs. 2-7, it will be seen that in the upper portion of
block 44 of thecombination unit 42 there is anotherrecess 66 which contains adog 68 having at least onetooth 70 thereon, but preferably has a plurality ofsimilar teeth 70, which are complementary to therecesses 72 between theteeth 28 of the upper rack ofteeth 28 onplunger rod 26, said tooth or teeth being hereinafter referred to as "second" tooth or teeth, the same operating in a manner so as to permit advancing increments of movement of theplunger rod 26 in the manner described below. -
Dog 68 is supported upon a transverse pintle oraxis 74 which, if desired, may be integrally molded with thedog 68 from suitable rigid plastic material, or otherwise, the ends of thepintle 74 being rotatably supported withincomplementary recesses 76 which, as best shown in Fig. 3, compriseslots 76 which are parallel to theplunger rod 26 and extend inward from one face ofspace 66 in theblock 44 and, upon inserting the ends of thepintle 74 in said slots, said slots then are closed by frictionally inserting arectangular block element 78 therein. Such blocks, best shown in Figs. 2 and 3, are parallel and extending from opposite faces of thedog 68, areprojections 80 and a biasing U-shapedspring 81 extends around thepintle 74 and opposite ends thereof respectively abut the upper surface ofrecess 76, as viewed in Fig. 3, and one of theears 80. - The operation of
dog 68 is as follows: Initially, when the device is in idle position, thecombination unit 42 is in the elevated position such as shown in Figs 2, 3 and 6. In this position, thefirst teeth 64 ofblock 44 are in engagement with therack teeth 30 in the lower side ofplunger rod 26. When theblock 44 is depressed, for example, to the positions shown if Figs. 4, 5 and 7, thefirst teeth 64 are disengaged from theteeth 30 of the lower rack and when in this position, if desired, theplunger rod 26 may be manually moved in feeding direction until either the forward end ofplunger rod 26 engages thepiston 24 of ampule orcartridge 20 or, as mentioned above, if the forward end of the body has another form of compartment to contain the dispensible material, theplunger rod 26 preferably will be complementary to the inner walls of such compartment and thus engage material to be dispensed. - Such initial feeding movement of the plunger rod to engage either the piston or the material, as aforesaid, may occur by manually engaging the
button 34 and moving the plunger rod in feeding direction. When themember 44 is depressed to release thefirst teeth 64 from engagement with therack teeth 30, it will be seen from Fig. 4 that the so-calledsecond teeth 70 ondog 68 are merely commencing to engage theteeth 28 on the uppermost rack of teeth and, under such circumstances, theplunger rod 26 is capable of being moved in feeding direction, as shown by the arrow on said member in Fig. 4, for a limited increment of distance sufficient to effect discharging a small amount of material from the forward end of the syringe. - As such forward movement of the
piston rod 26 continues; however, the biasingspring 81 urges thedog 68 clockwise and the feeding movement of theplunger rod 26, which is caused byspring 38, actually effects such increment of feeding movement of the plunger rod and the so-calledsecond teeth 70 ultimately fully mesh with theteeth 28 of the upper rack in somewhat of a camming action and, as shown in Fig. 5, finally stop any further feeding movement ofplunger rod 26. Thus, by sequentially depressing theblock 44 to actuate thecombination unit 42 and then releasing the same, increments of feeding movement of theplunger rod 26 are effected until the desired amount of material has been discharged from thenozzle 22 or other discharge means at the forward end of the device in a manner in which the material is readily visibly seen by the operator for accurate placement. - When it is desired to move the
plunger rod 26 in retracting position, this is readily accomplished by depressing theblock 44 to disengage theteeth 64 on the block from therack teeth 30 on the lower side ofpiston rod 26. Withdrawal movement, as visualized in Fig. 7, in connection with the direction arrows on the right-hand side thereof, easily is effected by cammingly moving theupper rack teeth 28 with respect to thesecond teeth 70 ondog 68 against the action of the biasingspring 80. - It is also contemplated within the purview of the present invention, that especially if the
plunger rod 26 is in its outer most extended position, such as that illustrated in Fig. 1, wherein the forward end of the plunger rod may be spaced a substantial distance from thepiston 24, for example, or its equivalent means in other construction described hereinabove; initial movement of the plunger rod in feeding direction until it engagespiston 24 or otherwise, may be effected by limited modification of the device. For example, by only partially depressing theblock 44 against the action of thespring 58 sufficiently to barely disengage thestop teeth 64 from therack teeth 30 on the plunger rod and then forceably pushing upon thebutton 34 to move thepiston rod 26 in feeding direction against the operation ofsecond teeth 70 on thedog 68, somewhat in camming manner or otherwise; this may be made possible, for example, by suitable angulation of therespective teeth teeth 70 are not fully meshed with theteeth 28 of the rack thereof. - Thereafter, forward advance movement of the
plunger rod 26 is effected by successively depressingblock 44 and manually releasing the same to produce the aforementioned increments of movement of the plunger rod in feeding direction and thereby dispense a desired amount of material from nozzle means at the forward end of the device. The above-described operation ofteeth 70 relative to rackteeth 28 is made so as not to require the tedious initial advance movement of theplunger rod 26 toward thepiston 24 by such successive depressings and releasings of theblock 44 until the forward end ofrod 26 engagespiston 24 or otherwise. - From the foregoing, it will be seen that the present invention provides a relatively simple multiple dosage syringe readily operated by successively manually depressing and releasing the combination stop and
release member 42, comprisingblock 44, while comfortably and conveniently holding the device in the hand of the operator pen-like and no additional manipulation of theplunger rod 26 is required to effect such stepwise feeding. The mechanism employed to effect such feeding movement is far more simple than the presently used syringes capable of effecting successive movements of the plunger rod thereof, whereby the present invention constitutes a meritorious advance over the prior art. Further, substantially all components of the syringe may be manufactured precisely by molding from plastic or similar rigid material, thereby minimizing the cost of production. - The foregoing description illustrates preferred embodiments of the invention. However, concepts employed may, based upon such description, be employed in other embodiments without departing from the scope of the invention. Accordingly, the following claims are intended to protect the invention broadly, as well as in the specific forms shown herein.
Claims (17)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/801,974 US4659327A (en) | 1985-11-26 | 1985-11-26 | Multiple dosage syringe |
US801974 | 1991-12-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0225439A1 true EP0225439A1 (en) | 1987-06-16 |
Family
ID=25182498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86112792A Withdrawn EP0225439A1 (en) | 1985-11-26 | 1986-09-16 | Multiple dosage syringe |
Country Status (5)
Country | Link |
---|---|
US (1) | US4659327A (en) |
EP (1) | EP0225439A1 (en) |
JP (1) | JPS62127062A (en) |
AU (1) | AU586276B2 (en) |
CA (1) | CA1270668A (en) |
Cited By (2)
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EP0360329A1 (en) * | 1988-09-13 | 1990-03-28 | Koninklijke Emballage Industrie Van Leer B.V. | Hypodermic syringe |
EP0645124A1 (en) * | 1993-09-23 | 1995-03-29 | Heraeus Kulzer Gmbh | Syringe for dosing viscous substances, in particular for dental substances |
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US4963093A (en) * | 1989-02-06 | 1990-10-16 | Dragan William B | Dental syringe tip and syringe holder therefor |
FR2642623B1 (en) * | 1989-02-08 | 1991-05-03 | Oreal | DISPENSER COMPRISING A TRANSLATABLE PISTON |
WO1991007924A1 (en) * | 1989-11-23 | 1991-06-13 | Southern Dental Industries Limited | Dental amalgam capsule |
SE9103215D0 (en) * | 1991-11-04 | 1991-11-04 | Kabi Pharmacia Ab | A METHOD AND DEVICE FOR DOSING A LIQUID PREPARATION |
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US20020077270A1 (en) * | 2000-01-31 | 2002-06-20 | Rosen Craig A. | Nucleic acids, proteins, and antibodies |
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GB0107604D0 (en) * | 2001-03-27 | 2001-05-16 | Dca Design Int Ltd | Improvements in and relating to injection device |
US6613010B2 (en) | 2001-04-13 | 2003-09-02 | Penjet Corporation | Modular gas-pressured needle-less injector |
US20050192530A1 (en) * | 2001-04-13 | 2005-09-01 | Penjet Corporation | Method and apparatus for needle-less injection with a degassed fluid |
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US6824526B2 (en) | 2001-10-22 | 2004-11-30 | Penjet Corporation | Engine and diffuser for use with a needle-less injector |
US7141036B2 (en) * | 2002-06-04 | 2006-11-28 | Syringe, Llc | Methods of applying a medicinal substance |
US20050010174A1 (en) * | 2002-06-04 | 2005-01-13 | Berman Irwin R. | Applicator and methods of applying a substance |
US7125394B2 (en) | 2002-06-04 | 2006-10-24 | Syringe, Llc | Applicator for dispensing a medicinal substance |
US7018356B2 (en) | 2002-10-31 | 2006-03-28 | Wise Roger R | Method and apparatus for adjusting the contents of a needle-less injector |
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MX2012006290A (en) | 2009-12-23 | 2012-07-03 | Colgate Palmolive Co | Oral care system. |
US8882380B2 (en) | 2009-12-23 | 2014-11-11 | Colgate-Palmolive Company | Oral care system, kit and method |
KR101473539B1 (en) | 2009-12-23 | 2014-12-16 | 콜게이트-파아므올리브캄파니 | Oral care system |
EP2604142B1 (en) * | 2010-08-11 | 2020-04-08 | Kotobuki & Co., Ltd. | Knock-type feeding container |
EP2651261B1 (en) | 2010-12-15 | 2014-10-15 | Colgate-Palmolive Company | Oral care dispenser |
US8535268B2 (en) | 2010-12-22 | 2013-09-17 | Alcon Research, Ltd. | Device for at least one of injection or aspiration |
JP5747722B2 (en) * | 2011-08-02 | 2015-07-15 | ニプロ株式会社 | Nasal administration container |
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US10799690B2 (en) | 2012-09-13 | 2020-10-13 | Syringe Llc | Applicator for dispensing a medicinal substance and methods associated therewith |
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US20150005708A1 (en) * | 2013-06-28 | 2015-01-01 | Juvaplus Sa | Injection device |
CN106573105B (en) | 2014-07-24 | 2019-10-18 | 泰利福医疗公司 | Dose dispensing syringe |
US10518036B2 (en) | 2014-12-12 | 2019-12-31 | SHL Medical, AG | Dose setting mechanism and medicament delivery device comprising the dose setting mechanism |
US10426251B2 (en) | 2015-02-02 | 2019-10-01 | Colgate-Palmolive Company | Oral care system and oral care material dispenser |
AU2016269848B2 (en) * | 2015-06-02 | 2021-12-09 | Intravital Pty Ltd | Formulation and process for limiting nerve trauma |
USD820439S1 (en) | 2016-06-13 | 2018-06-12 | Carebay Europe Ltd. | Medicament delivery device |
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- 1985-11-26 US US06/801,974 patent/US4659327A/en not_active Expired - Lifetime
-
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- 1986-08-22 CA CA000516600A patent/CA1270668A/en not_active Expired - Lifetime
- 1986-09-10 AU AU62553/86A patent/AU586276B2/en not_active Ceased
- 1986-09-16 EP EP86112792A patent/EP0225439A1/en not_active Withdrawn
- 1986-10-14 JP JP61242191A patent/JPS62127062A/en active Pending
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US3641673A (en) * | 1969-01-22 | 1972-02-15 | Jozeph Roelof Jochems | Amalgam gun |
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---|---|---|---|---|
EP0360329A1 (en) * | 1988-09-13 | 1990-03-28 | Koninklijke Emballage Industrie Van Leer B.V. | Hypodermic syringe |
EP0645124A1 (en) * | 1993-09-23 | 1995-03-29 | Heraeus Kulzer Gmbh | Syringe for dosing viscous substances, in particular for dental substances |
Also Published As
Publication number | Publication date |
---|---|
US4659327A (en) | 1987-04-21 |
JPS62127062A (en) | 1987-06-09 |
AU6255386A (en) | 1987-05-28 |
CA1270668A (en) | 1990-06-26 |
AU586276B2 (en) | 1989-07-06 |
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Inventor name: BENNETT, DOUGLAS D. Inventor name: WELSH, RICHARD E. Inventor name: KOPUNEK, THOMAS V. Inventor name: HAMMESFAHR, PAUL D. Inventor name: FRANCIS, EARL C. |